president obama and governor romney working very hard for their money and votes in the battle ground state of ohio. we have tracie potts with the latest on the race for the white house. >> reporter: president obama is back at the white house this morning after hitting eight states in two days, including something we have never seen before. >> you are right. >> reporter: a president voting early. >> it means you don't have to figure out whether you need to take time off work to figure out how to pick up the kids and still cast your ballot. if something happens on election day. >> reporter: if there is any doubt which state could swing the election, the president wrapped his tour in ohio. >> i have come to ohio today to ask you for your vote. >> reporter: governor romney spent all day in ohio. >> now that's an ohio welcome. thank you! >> reporter: and paul ryan launches a bus tour in ohio this weekend. >> the choice is yours on november 6th. >> reporter: today, governor romney is in iowa talking about the economy after greeting a crowd of 12,000 at a concert last night in ohio. >> this